As has been said... It's all just the same stuff.
75 ohm cables are used in the following cable types and you can use RG-6 Quad Shield coaxial cable (go to Home Depot, they'll have a 500 foot roll for you to see).
75ohm cables:
Component Video (3 cables - typically marked red, green, and blue)
S-Video (2 cables, special end)
Composite Video (1 cable - typically marked yellow)
Analog Line Level Audio (2 cables - typically one is marked red or black, the other white)
Digital Coaxial Audio (1 cable - typically marked orange)
RGBHV/VGA (5 cables - typically marked red, green, blue, yellow, black or white)
The only two types of cables in my home I didn't make myself are a couple of optical digital cables and my HDMI cables. Everything else you can do yourself and takes some time.
I will have a review up shortly of some 75 ohm DIY cables that take a total of 30 seconds for the average wife to prep and terminate.
No, I'm not joking.
FYI - a post where I go over this in detail with links to Parts Express products...
http://www.bigscreenforums.com/forum_topic.cfm?which=2053